Falling arterial blood pressure promotes falling arterial blood pressure promotes enhanced sodium ion loss in urine vasoconstriction vasodilation enhanced water loss in urine

Atrial natriuretic peptide released by certain atrial cells in response to rising BP or volume, causes systemic vasodilation and inhibits renin, aldosterone, and ADH release. Hence, it enhances Na+ and water excretion, reducing BP and bv.  Falling arterial pressure promotes vasoconstriction and conserves Na+ and water.

the answer to your question is b

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.